What is the value of the expression when n = 3?

Which is the graph of f(x) = (4)x? image for option 1 image for option 2 image for option 3 image for option 4

Ifurniture stores having a weekend sale and is offering 20% discount on patio chairs and table the sales tax on furniture is 6.25 using function composition how can you represent the total amount a that you would need to pay for this furniture that cost x dollars

Is it greater than or less than7*3_9*2